Roche cobas b 221 system

Roche Diagnostics May 2009
Service Manual · Version 9.0 D-131
cobas b 221 system 7 Troubleshooting
Important test routines
V18
Error message: Valve 18 nOk –
Remedy: o Check plug and cable of valve.
o Replace valve.
o Replace vacuum control board.
Vacuum pump
Error message: Power supply of the vacuum pump nOk –
Remedy: o Check plug and cable of vacuum pump.
o Replace pump unit.
o Replace vacuum control board.
Main fan
Fan 1
Error message: Main fan 1 nOk –
Remedy: o Check fan unit for mechanical blockage.
o Check plug and cable of fan unit.
o Replace fan unit.
o Replace mainboard.
Fan 2
Error message: Main fan 2 nOk –
Remedy: o Check fan unit for mechanical blockage.
o Check plug and cable of fan unit.
o Replace fan unit.
o Replace mainboard.
Hemolyzer
Error byte Hemolyzer
Error message: Function of hemolyzer nOk –
Remedy: o Unscrew cap of hemolyzer, check hemolyzer for moisture and if necessary dry;
then repeat test.
o Check plug and cable of hemolyzer.
o Replace hemolyzer.
o Replace HSIN board.